Property and Equipment

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment:

Property and equipment, summarized by major category, consist of the following as of:

	September 30, 2021		December 31, 2020
Machinery & equipment	$	4,849	$	4,683
Right of use, building lease	260		471
Computer equipment & software	640		272
Office furniture & equipment	174		174
Leasehold improvements	43		43
Idle equipment	679		679
Construction in progress	—		119
Total	6,645		6,441
Less accumulated depreciation and amortization	(5,120)		(5,023)
Total property and equipment, net	$	1,525	$	1,418

Depreciation expense for the three-month periods ended September 30, 2021 and September 30, 2020, was approximately $0.04 million and $0.2 million, respectively. Depreciation expense for the nine-month periods ended September 30, 2021 and September 30, 2020, was approximately $0.1 million and $0.5 million, respectively. Depreciation expense for the nine- month period ended September 30, 2020 includes a $0.3 million one-time charge due to BUNAVAIL equipment write-off.